svn commit: r203657 - head/sys/kern

[Alexander Leidinger]

Quoting David Xu <davidxu at FreeBSD.org> (from Mon, 8 Feb 2010 07:31:05  
+0000 (UTC)):

> Author: davidxu
> Date: Mon Feb  8 07:31:05 2010
> New Revision: 203657
> URL: http://svn.freebsd.org/changeset/base/203657
>
> Log:
>   Set waiters flag before checking semaphore's counter,
>   otherwise we might lose a wakeup. Tested on postgresql database server.

Uhm... if I ktrace a hanging process and I see some semop()s (I assume  
it is waiting on some event to happen), where on Linux this process is  
working correctly, then I would like to test this patch to see if the  
process still has the same problem?

Or differently asked: this affects the operation of semop(2)?

Bye,
Alexander.

-- 
We only acknowledge small faults in order
to make it appear that we are free from great ones.
		-- LaRouchefoucauld

http://www.Leidinger.net    Alexander @ Leidinger.net: PGP ID = B0063FE7
http://www.FreeBSD.org       netchild @ FreeBSD.org  : PGP ID = 72077137